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Drain lines

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001473
EISBN: 978-1-62708-229-7
... notch-sensitive and liable to rupture in a brittle manner. Discontinuities were present in the rims formed by the drain holes drilled in their abutting faces, and possibly enhanced by the stress-raising effect of microcracks in the smeared metal at their surfaces It is probable that the load reached a...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001559
EISBN: 978-1-62708-229-7
..., the system had been flushed, drained, and heat traced [1] to temperatures greater than 200°F. Leaks were detected during subsequent hydrostatic testing. The lines were examined and evaluated for integrity and fitness for operation. Pre-operational test data indicated that, after the system had...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001058
EISBN: 978-1-62708-214-3
... pressure, the water acted as a powerful, concentrated jet stream, propelling the broken end of the plug at high velocity. The severity of the accident would have been greatly reduced if the line had been depressurized and/or drained as a safety precaution, before force was applied to the system...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001808
EISBN: 978-1-62708-241-9
... of poor operations or improper materials selection, and thus often preventable. heat exchangers drain lines corrosion bacterial growth copper stainless steel pitting perforations microscopy corrosion resistance 304L stainless steel (austenitic wrought stainless steel) UNS S30403...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... have investigated 13 fatigue-related failures of small-bore, socket-welded fittings from nine different nuclear plants. These failures occurred in vent lines, drain lines, sample lines, and instrument lines. The following systems were affected: Residual Heat Removal System Main Coolant Loop...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001064
EISBN: 978-1-62708-214-3
.... Drying should be assisted by flushing with methanol, if possible. If the system cannot be completely drained, then the hydrotest should be conducted by using either clean steam condensate or demineralized water, or by using potable water followed by a demineralized water rinse to give an effluent...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001713
EISBN: 978-1-62708-220-4
... chemicals being processed. Even if the graphite seal was kept in perfect condition, it could fail unexspectdly and water would flow into the blender. If this blender had to be used, it would have be advisable not to use agitation so the water cooling system could be drained to prevent an accident. A...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001143
EISBN: 978-1-62708-229-7
... such cases, a second mechanism that may cause liquid droplet erosion in the HP or IP turbines is the failure of the water level control mechanism on one of these heaters. This will allow water to drain back into the turbine. Liquid droplet erosion pits on the HP or IP turbine blades are evidence of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... direction of rapid fracture progression. Ductile cracking by MVC cannot have a herringbone pattern, although a macroscale radial pattern and chevrons can occur from MVC. River lines on a macroscopic scale may be revealed in glassy polymers but not on a macroscopic scale in a metallic material. With regard...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... drain connector socket weld located on the bottom right end of the header (see Figure 2 ). Based on failure records and the results of the nondestructive tests, the primary concerns with regard to the future serviceability of the header were the condition of the remainder of the weld seam, and the...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... the production line, because every engineered product has flaws, or “deviations from perfection” ( Ref 15 ). On the manufacturing floor, these flaws are measured, compared with the preestablished limits of acceptability, and dispositioned as acceptable or rejectable. A rejectable characteristic is...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
... systems where temperatures are high. Fig. 9 Friction factors for flow through test lines under biocide treatment in an oilfield produced-water system indicate the extent of biofouling. In this case, biocide A loses control of microbial fouling after 60 days relative to biocide B. Fig. 10...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... by (I) hydrogen embrittlement, (II) cracking of unstable passive film, and (III) cracking initiated at pits near the pitting potential. Vertical dashed lines define potential range over which nonpassivating films may crack under stress. Source: Ref 9 Anodic dissolution (SCC) is...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
...) Structural members should be designed to avoid retention of liquids; L-shaped sections should be used with the open side down, and exposed seams should be avoided. (c) Incorrect trimming or poor design of seals and gaskets can create crevice sites. (d) Drain valves should be designed with sloping bottoms to...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... copper preservatives can be corrosive to certain nails. Aluminum cladding can also be at risk. (g) Contact of two metals through a fluid trap can be avoided by using a drain, collection tray, or a deflector. Where dissimilar materials are to be joined, it is advisable to use a more noble metal in...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... line identified as “Tentative safe SCC limit.” Source: Ref 10 Determining the environment to which a metallic component will be exposed is not always as straightforward as it may appear. Often, SCC will result from a local environment in which injurious ions concentrate, such as in a crevice...